Meaning of “semilunar valve” in the English Dictionary

british dictionary

"semilunar valve" in British English

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semilunar valvenoun [ C ]

uk /ˌsem.i.luː.nə ˈvælv/ us /ˌsem.i.luː.nɚ ˈvælv/ specialized

one of the valves (= structures that open and close) that stop blood from returning into the ventricles (= lower spaces) of the heart

(Definition of “semilunar valve” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)